The National Internet Segment Reliability Research explains how the outage of a single Autonomous System might affect the connectivity of the impacted region with the rest of the world. Most of the time, the most critical AS in the region is the dominant ISP on the market, but not always.
As the number of alternate routes between AS’s increases (and do not forget that the Internet stands for “interconnected network” - and each network is an AS), so does the fault-tolerance and stability of the Internet across the globe. Although some paths are from the beginning more important than others, establishing as many alternate routes as possible is the only viable way to ensure an adequately robust network.
The global connectivity of any given AS, regardless of whether it is an international giant or regional player, depends on the quantity and quality of its path to Tier-1 ISPs.
Usually, Tier-1 implies an international company offering global IP transit service over connections with other Tier-1 providers. Nevertheless, there is no guarantee that such connectivity will be maintained all the time. For many ISPs at all “tiers”, losing connection to just one Tier-1 peer would likely render them unreachable from some parts of the world.
There would be no TL;DR in this article, sorry.
Those have been three months that genuinely changed the world. An entire lifeline passed from February, 1, when the coronavirus pandemics just started to spread outside of China and European countries were about to react, to April, 30, when nations were locked down in quarantine measures almost all over the entire world. We want to take a look at the repercussions, cyclic nature of the reaction and, of course, provide DDoS attacks and BGP incidents overview on a timeframe of three months.
In general, there seems to be an objective pattern in almost every country’s shift into the quarantine lockdown.
Closely watched events of 2019
This report explains how the outage of a single AS can affect the connectivity of the impacted region with the rest of the world, especially when it is the dominant ISP on the market. Internet connectivity at the network level is driven by interaction between autonomous systems (AS’s). As the number of alternate routes between AS’s increases, so goes the fault-resistance and stability of the internet across the network. Although some paths inevitably become more important than others, establishing as many alternate routes as possible is the only viable way to ensure an adequately robust system.
The global connectivity of any AS, regardless of whether it is a minor provider or an international giant, depends on the quantity and quality of its paths to Tier-1 ISPs. Usually, Tier-1 implies an international company offering global IP transit service over connections to other Tier-1 providers. But there is no guarantee that such connectivity will be maintained. Only the market can motivate them to peer with other Tier-1’s to deliver the highest quality service. Is that enough? We explore this question in the IPv6 section below. For many ISPs at all levels, losing connection to just one Tier-1 peer would likely render them unreachable in some parts of the world.
Let’s examine a case where an AS experiences significant network degradation. We want to answer the following question: “How many AS’s in the region would lose connectivity with Tier-1 operators and their global availability along with it?”
As many of our readers know, Qrator.Radar is constantly researching global BGP connectivity, as well as regional. Since the Internet stands for “Interconnected Networks,” to ensure the best possible quality and speed the interconnectivity of individual networks should be rich and diverse, with their growth motivated on a sound competitive basis.
The fault-resistance of an internet connection in any given region or country is tied to the number of alternate routes between ASes. Though, as we stated before in our Internet Segments Reliability reports, some paths are obviously more critical compared to the others (for example, the paths to the Tier-1 transit ISPs or autonomous systems hosting authoritative DNS servers), which means that having as many reachable routes as possible is the only viable way to ensure adequate system scalability, stability and robustness.
This time, we are going to have a closer look at the Russian Federation internet segment. There are reasons to keep an eye on that segment: according to the numbers provided by the RIPE database, there are 6183 autonomous systems in Russia, out of 88664 registered worldwide, which stands for 6.87% of total.
This percentage puts Russia on a second place in the world, right after the USA (30.08% of registered ASes) and before Brazil, owning 6.34% of all autonomous systems. Effects of changes in the Russian connectivity could be observed across many other countries dependant on or adjacent to that connectivity, and ultimately by almost any ISP in the world.
While working on the annual report this year we have decided to avoid retelling the news headlines of the previous year and, though it is almost impossible to ignore memories absolutely, we want to share with you the result of a clear thought and a strategic view to the point where we all are going to arrive in the nearest time - the present.
Leaving introduction words behind, here are our key findings:
In this article we have tried to cherrypick all the most interesting parts of our report, though if you would like read the full version in English, the PDF is available.
The report explains how the outage of a single AS affects the global connectivity of the region, especially when it is the biggest ISP of a given country. Internet connectivity at the network level is driven by the interaction between autonomous systems (AS’s). As the number of alternate routes between AS’s increases, so goes the fault-resistance and stability of the internet in a given country. However, some paths become more important than others and having as many alternate routes as possible is the only viable way ensure the system is adequately robust.
The global connectivity of any AS, regardless of whether it is a minor provider or an international giant, depends on the quantity and quality of its paths to Tier-1 ISP’s. Usually, Tier-1 implies an international company offering global IP transit service over connections to other Tier-1 providers. But there is no obligation to maintain such connectivity. Only the market can motivate them to peer with other Tier-1’s to deliver the highest quality service. Is that motivation enough? We explore this question in the IPv6 section below. If an ISP loses its connection to at least one of its Tier-1 peers, it would likely become unreachable in some parts of the world.
We would like to present you, the reader, a shorter version of the annual Qrator Labs report on cyber- and infosecurity, as well as DDoS, that covers the year 2017. Special thanks to our longstanding partner — Wallarm, for supporting us with content on notable vulnerabilities and hacks.
In 2017 Qrator Labs and Wallarm noticed increasing diversification of threats from a widening variety of attack methods. The range of critical vulnerabilities on today’s web is so broad that attackers can choose from many different methods to create problems for almost any organization. A growing number of tools can operate automatically making centralized command & control unnecessary.
If 2016 could be named the year of botnets and terabit attacks, then 2017 was the year of ransomware and routing. The incidents, like Google in Japan and Level3 in the United States, Rostelecom in Russia, and many others demonstrate the persistently strong risks from human factors rooted in mismanagement and insufficient automation. A brave engineer who confidently cancels an important automated script could create the possibility of severe issues in internet service availability and accessibility.